Camera light flashing blue without accessing the app?

This morning I just happened to glance over at my camera and saw the camera flashing blue, which as I understand it, means someone is currently watching the feed. I went into my app to access it myself, closed it, and the blinking then stopped (I hadn't accessed it for maybe 12-16 hours since then). About 30-45 minutes later I stood in front of the camera, curiously watching it, and the light began to flash blue again. I checked my account and didn't see any suspicious devices, nor did I see any when I checked my home network. Could my account be compromised and/or someone has access to my camera feed somehow?

edit: I have changed my password and logged out of all devices other than mobile. I have blacklisted all wifi devices except the ones I already know are mine, yet this issue persists. It almost seems like I can trigger the camera light to begin flashing blue by creating a lot of motion or noise in front of the camera. Is this a known bug, or is the camera light supposed to begin flashing blue when it detects a lot of motion/noise?